I grew up within sighting distance of the castle, and like yourself radioactiveman, spent alot of time exploring the place as a kid, and and even up until recently when they cordoned it off. The castle that stands there now is , in my opinion, one of the finest in the country, the fact that it is only just over 100 years old detracts from any major historical importance, hence one will rarely find it featured in tourist books etc. There has been a castle on the site for centuries, but numerous fires and sieges resulted in it's reconstruction. The current structure was built with reinforced concrete floors, one of the pioneering projects in the region. It really is a fine building, with it's numerous turrets, courtyards and passageways, and in my opinion it's a shame it has been sold, really was such a great amenity. You know what it was sold for? 500 k's! What a steal, makes it even more infuriating.
It was bought by a descendant of the freke-evans family, a successful wall street businessman. A friend of mine working on the project informs me that work has been stopped due to planning violations, knocking of existing structures etc, a disgrace really.